Assignee
HEIL OSKAR
4 granted patents·137 citations·filing 1976–1978
Top patents by PatentIndex Score
4 records- 0183US4039044ALow frequency electro-acoustic transducer with interconnected diaphragms interleaved with fixed diaphragmsHEIL OSKAR·Filed 1976·Granted Aug 2, 1977·57 cites·1 claims
- 0277US4056697AMovable diaphragm connector method flexible hinge diaphragm surround and electro-acoustic transducer with folded diaphragm with intermediate flexible portionsHEIL OSKAR·Filed 1976·Granted Nov 1, 1977·45 cites·3 claims
- 0358US4107479AElectro-acoustic transducerHEIL OSKAR·Filed 1976·Granted Aug 15, 1978·25 cites·15 claims
- 0448US4160883AAcoustic transducer and method of making sameHEIL OSKAR·Filed 1978·Granted Jul 10, 1979·10 cites·46 claims
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